(Pers. : Fr.) Petersen & Redhead
Identity
Unique IDELEMENT_GLOBAL.57.9940
Element CodeNFSM000035
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryFungus
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomFungi
PhylumBasidiomycota
ClassBasidiomycetes
OrderAgaricales
FamilyTricholomataceae
GenusDendrocollybia
SynonymsCollybia racemosa(Pers.) Quel.
Concept ReferenceCastellano, M.A., E. Cazares, B. Fondrick, and T. Dreisbach. 2003. Handbook to additional fungal species of Special Concern in the Northwest Forest Plan. Gen. Tech. Rep. PNW-GTR-572. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 144 pp. Online. Available: https://www.fs.usda.gov/pnw/pubs/pnw_gtr572.pdf
Taxonomic CommentsThe synonyms of Dendrocollybia racemosa include Agaricus racemosus Pers., Collybia racemosa (Pers.) Quél., Microcollybia racemosa (Pers.) Lennox, Mycena racemosa (Pers.) Gray, Sclerostilbum septentrionale Povah, Sclerotium fungorum var. lacunosum (Pers.) Fr., Sclerotium lacunosum Pers., and Tilachlidiopsis racemosa Keissl (Siegel et al. 2019). The populations in Europe, Eastern North America, and northwestern North America are widely disjunct, and may represent different, but undescribed species (Santa Cruz Mycoflora Project 2022).
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2022-07-22
Change Date2022-07-22
Edition Date2022-07-22
Edition AuthorsLorelei L. Norvell (2002), rev. C. Nordman (2022).
Threat ImpactMedium
Range Extent>2,500,000 square km (greater than 1,000,000 square miles)
Number of Occurrences81 - 300
Rank ReasonsDendrocollybia racemosa has a large range, including northwestern North America and Western Europe. It is rare outside the Pacific Northwest of the United States and Canada, but is known from 250 locations, and occurs on many National Forests, State Parks, and National Parks. It is considered common in the Coast Range of northern California. The California Rare Fungi Working Group believes this fungus is common and should be delisted.
Range Extent CommentsDendrocollybia racemosa has a large range (about 21 million square kilometers) in the northern hemisphere (including Eastern North America, and Western Europe), but it is rare outside the Pacific Northwest of the United States, and British Columbia, Canada (Bazzicalupo et al. 2022, Castellano et al. 2003, Desjardin 1998, iNaturalist 2022, MyCoPortal 2022). It is common and widespread in the California coastal province, and occasional in the foothills of the Sierra Nevada, it has also been documented in Oregon, and Washington, throughout the range of the northern spotted owl (ISMS-ONH 2002, Siegel et al. 2019).
Occurrences CommentsDendrocollybia racemosa is common and widespread in the California coastal province, and in the Klamath Mountains. In the Sierra Nevada, Dendrocollybia racemosa is found occasionally in the foothills, mainly below 1200 meters elevation. It is known from at least 45 locations in California (Siegel et al. 2019). There may be about 250, or more occurrences (iNaturalist 2022, MyCoPortal 2022).
Threat Impact CommentsCollection data are too sparse and occurrences too spotty and rare to predict what threats will imperil Dendrocollybia racemosa. Presumably whatever threatens the host fungi, general habitat, microclimates, and/or host's substrate or symbiotic partner will likewise imperil Dendrocollybia racemosa. Other threats include incidental catastrophic events (wildfires), road construction, development, and heavy logging activities (Norvell pers comm 2002).